Grinding machine for mill burrs or other articles



v`pril 3, 192s.

1,665,177- c. A. RYAN GRINDING MACHINE FOR MILL BURRS OR OTHER ARTICLES Filed oct. 'L 1925 2 sheets-sheet 1 oi I ol O I@ I 'O '-o K \r n Q ,l1 H'nl'' f MM2/MM Aprila, 192s. .1,665,177

C. A. RYAN GRINDING MACHINE FOR MILLBURRS OR OTHER'ARTIGLS Filed oct. v, 1925 l2 sheets-Shea; 2

IN vE N rol?. C. awr/m. 6r /l/.s HUM/vers,

Y employed in most rural Patented Apr. 3, 192s'.

ooNRAD A. `I'gYiirLfor CaNroNQMINNEsofTA.

' GRINDING MACHINETQR MILL BURRS oRoTHEaARTIoLs: v

Y v appiicfmonl filed october 7,1925. serial Meo-,995;

This invention has `for-its object to provide a'highly eiicient grindingmachine for mill burrs or other articles having a relatively 'fiat circular surface orfa fiatV surface having up-v standing cuttingfedges thereon. .Y

At the present time', the grinding burrs are usually' discarded when" theybecome pitted or dulled. "This invention providesl a simple grinding machine especially adapted" to grind mill burrs having vupstanding cut-- Y ting edges on a disk-like or V.annular surfacey usually radially and concentrically arranged of either flat or beveled type.A 15' Itv is a further object of the invention to vprovide a devicel of this kind, wherein the by theangle between the axis thereof andthe burr or' other article to be ground is mounted on a rotating carriervrmember and subjected` to a transversely movable grinding wheel rotating in the opposite direction preferably land adapted to tion of the rotating move across ay sufiicient porburr -or' other article to sharpen all cutting edges-thereon i slightly tilted to one side or the other, whereaXis of the grinding membermay be varied to grind bevels of differentpitchon -thelburrs orV other articles. Y .Y -An additional object of theflnvention is to provide eicient means for driving the rotating-parts, regulating the position of the same l with respect to each other, land moving the` 5 grinding wheelacross aportionof the burr Imounted on the carrier.

`These and other objectsof the invention `will be apparent from thefollowing descrip-I tion made in connectionwith the accompany# -ing drawings, whereinflike charactersl refer to similar parts throughout the several views,

and in which,

y ofthe invention;

Fig. 2 is a rear elevation vof the same Fig. u3 is a detail elevationshowing the carlv rier plate with fragments of a burr mounted thereon;.and i' Fig.v 4 is a cross section, on an enlarged scale, taken on the line-4 4 of Fig. 3Q

provided, comprising a l ypair yofspaced side members or timbers 5, a

securedaeross theends of lside and'intermedlate parallel spaced our and feed millsl f grinding-.shaft f Fig. 1 1s a plan View of the preferred form Y tally" on the Aframe transverse members 8'9 and 10, respectively,

secured acrossy side membersy 5,1nembersv 9 A longitudinally 'disposed member A11 isse- 'cured across members 10 and eparallel with .the sides 5 of the frame, and having oneof beyond 'member v10- its ends-iV projecting` slightly beyond the centerline ofv the space between members?) and 10.-

A pair of horizontally aligned transverse bearings l2y are provided, one lsecured to one 'ofthe side members 5 l Y cent theprojecting end of member 1l, and a v third bearing '13,in alignmentwith bearings and one secured adj a- 12, is secured to the opposite side'memberf. 1 l

The grinding shaft 14 is journaled inl bearings 12- and 13`having oneof its ends normally projecting'aJ considerable distance be- A driving pulleyA 15` secured to one endffof shaft14fand a screw 18 having at its inner end the enlarged `head 18, is swivelly connected bers `9 and 10. i C

shaft 14V longitudinally l inY jeither direction.

`rank lever 2Q is rigidly` secured tothe-outeriend of screw 18 and objviously lmay .b erinanipulatedto* move the Vyond the b'earingf13, the purpose` of which"V -Will later be explained.' i Y y isfkeyed in yIt is a still further object in such "a device to provide a carrier member adapted to be a; relatively long sloty 14a to the v y ,l y

j longitudinal-ly`Y in either direction.l yPulley 15 isdriven by an endless belt 16 connectedjtoasuitablesource `-of;-power. VAfswiveledy collar I17 is rigidly to said collar. The screw 18 4is-fengagedfby thethreaded--vL i bearing 19EL carriedby `a strap 19, which is secured. acrossthe projecting ends'off-memgrinding Wheel 21- is rigidly securedto the shaft 14 and is adapted tobe movedwith the c of the sideinemb'ers 5. .n e

A bearing 22 is provided lwith a pair' of arcuate vslots 22a lat either Vside thereof, through`l` which slots nutted Vbolts 23l pass, permitting said bearing "to: swing horizonmember'9. yApairof horizontallyl aligned bearings 24 and v25A are 7' and. 8, respectively, slidably secured'to said rmembers by. bolts which lpass through the between member 11 andione n Y mounted on thetransverse framemembers In the: draw1ngs,.a relatively heavy rec` ltangular-frame 1s slots 24? and 25a, respectively, at'the sides of i saidfbearings. A carrier shaft 26 is journaled in the bearings 22 and 25,;'having its Y' ends projecting therebeyond, and having'rig' vor sockets 27a.

idly and detachably mounted at its inner" cesses27a, b urrs of dierent sized-,havingvdifl erently arrangedapertures therein, maybe readily accommodated.

g shaft 1 4 and, as shownin Figs.

Y Acoiledspring `bearing 24 and thccollar 30 rigidly'secured (of .shaft `26, to non ilnsirniefl infFig-.sii the `angles ai" said, hsrsls,

' rnally, vimpel the carrier `outward The axis.V of. vcarrier shaft 26y is obviously, transversely disposed with referencey tothe Vyfixedaxisl of grinding 1 and 2, the

Y burr A Vmounted, `onvcarrierk plate l27 `is Y, adapted to be engaged bytheg'rinding edge,l

yof the wheel 21,V lThebearing 24; is threaded ,toreceive Va screw 28, ,thennerend'of which contacts the ladjacent lextreini typt shaft 2 6. 29isiinterp0sed between the adjacentfthe extremity n Y shaft longitudinally against the working endet screw 28. A crankk lever 3 1 isrigidly secnredto the end of screw28 byA themanipulation of which carrier shaft 26 andcarrier` plate `2 j mayy be longitudinally, adjusted.A The 'shaft 26 maybe t-iltedineither direction,

. bearing 22 pivotingand bearng24 Sldingin anar@- "Such tilting is effected bykmeans of :a s'crew I32 havingy at xits ,inner end. theenlnrgcdihewl 32.a4 swiveledto collar 24? carriedfbyj bearing ,24, said screw 32.,.hnving threaded .en-

l gagement. withgthebcaring ,33 .and having the end thereof the vcrank carries a worm tengaging the worin gear p37, `On shaft 26.v

The shaft, 3,5.y is Projected beyond one side ofthe rarne rigidly carrying the pulley 28, which is ,driven from the grinding shatd/iby! means of theV endless Y imember 39.` 'A Lhand wheel rit), having a pluv.rality v :worm and ,drivingshaft idly sccnrsdto ftheishaft 26,;

the oper# ator lwhen itis desired to dispense withI the The4 Warm. gear V37 Jdrives lthe A ,carrierf shaft, in the'ire'verse direction from therotation of y,the grinding wheel, thus v.-increasinglthe, eiliciency ot the grinding of the burr mounted on the carry-f ing'plate,

AThe operation of the machineis Vprobably lobvious fromjthe foregoing description, in

connection w1th,the,drawings, but may be f briefly) .summarized as follows 2- The: @slaying pian, ,fir is n Si ieciifiby Y* unloo'sening its set screw and'the severalseci i Y .l

tions A of the burr or other article to be by. manipulating the' crank` Agrinding wheel willY preperlyA engagejthe of radially disposed"handles,` is rigl permitting the t,

'and extending transverse shaft. n grinding Wheelshaft, means for movlng said grinding wheel sockets 27s. The carrier 27 is then again rigidly secured to the end of shaft 26 and said will `be substantiallydnormalto the lsurface or edges of the burr A'to begrund. The car- `rier,plate27is then adjusted longitudinally 3l until the burr., The power, `is. .their tiene@ on: minnie 'grinding wheel is 'moved longitudinallyirxom Yone .side i0 the; other across .Ons annular' or dish-like tace. of; .theburrl 'A iby d manipulating t K I Y siriani, t-hs heIV 'crank 20.

y illustrateil, ihecirrier; shaft 26 is. iinisdfinths Opposite ,directicn freni that otihsrgririlihg i wheel driven from A the drivingV shaft- )con-1 nected directlyl grinding .shaftl-i, ,hni Ohiilisly ether ineens. may belveniployed for connecti ngsaid grindingshnit .14. with, the ,Carrier shaft." 2h.

Many 1 ,feefl and iilnnr Ymills .have .ccnisxly here Cutting edges h sind@ respectively, astil- -of thev standard burrs.; employed however, being exaggeratel'in thefdrawings.

It will beobvious thatphyl tiltingmthe Vcarrier shaftf 2G` slightly, by manipulating tthe A; 7 `crank Stine. hnrr` te hsgrniinflwill' hsheld at ihsrrsper. angle with .respect t0 'rhegrinfling Wheel, t0 permit the bevel ish@ @Qrrshtly sing ,rhs grin ingl Whfssl l tier .in rtstign in. .rhs The isha-fh 26 .may .then

uponv the other bevel n grsnndll be apparent rornthe foregoing de- ,scrintinn that applicant, has ,in "simple hui highly sfiisieni machins` ier, grin.Clingx rhill y lnirrs or Other. annlhgens sriiess; cgiriprising iai,

r n y shaft properly tilted vso that v"the grinding edge ofthe wheel-21 so"V to i theV presenting. snl :girlie x co t' fewparts, being durab'lefiin structureand Y capable of wide/employment.

shown yit to be successfulforall o'thezpurposes intended. Y l i It will, ofcourse, ous changes may bevrnade Iin,the-item1,'details, proportions' anduarrangementof without departing fr i i A 'l invention i What is claimed is Extensive4 actual usage ofY the fdevice' has L oml the scope'ot the 1. Almachine of the classdescribedcombefundeaaaitataan:

'parts1v arising a support n. Carrier,shsittjiiriinlsd;V

on said lsupport having a rotary carrier'vmembery mounted onv the inner-.endth ereof, a

` rinding shiiitjinnrnslgsrl' 'en seid( snippers i i ly .is .sind carrier Ong ssirlfgrinding.,

in both'directions across a portion of said'. .carrier member, andrneansfor adjyustmg said carrier shaft longitudinally including a longitudinally movable worm engaging the outer end of said carrier shaft, driving connections between said grinding shaft and said carrier shaft, and resilient means for impelling said shaft outwardly away from said grinding wheel. Y

2. A machine of the classvde'scribed having fin combination a frame, a pivot bearing and a slidable bearing mounted thereon, said last mentioned bearing being slidable in an are substantially concentric with the axis of said pivot bearing, a carrier shaft journaledn in said bearing and having a carrier member mounted on one end thereof, a grinding shaft having a grinding wheel` thereon mounted for engagement with an article secured to said carrier member, means for driving' said grinding and carrier shafts and a traveling wormgmounted on sai'deframe having swivel connection `with said slidable bearing for adjusting the same.

3. A machine for grinding mill` b urrs or other articles having in combination a substantially rectangular frame, a pivot bearing mounted substantially centrally thereof, a slidable bearing mounted inV longitudinal alignment therewith, a carrier shaft mounted for rotation in said bearings, a rotary carrier member mounted on the inner end of said shaft, a grinding shaft rotating on an axis transverse to the axis of said carrier'r .f

shaft-,a grinding wheel on said grinding shaft, means for moving said grinding wheel across a portionfof therot'ating surface of the article to be ground, means for swinging said shaft on said pivot bearing, adriving shaft geared to said carrier shaftand substantially parallel with said grinding shaft,- and means for connecting said grinding shaft with said driving shaft to drive the latter. v

4. In a machine of the class described a support, a pivot bearingmounted thereon, a'bearing also mounted onV saidl support slidable 'substantially'in an arc concentric with the axis of said pivot bearing, a car-l rier shaft journalled in said bearings and having a carrier member secured Vto one end thereof, a threaded bearing disposed adjacent theopposite end of saidcarriershaft and mounted for slidable movement substanf tially inv an arc concentric with the axis of said pivot bearing anda worm adapted to engage the adjacent end of said lcarrier shaft to adjust the same longitudinally, a grindingshaft disposed transversely to the axisof said carrier shaft carrying a grinding wheel, and rmeans connected to said rst mentioned slidable bearing for adjusting the same. Y Y v n In testimony whereof I afiix my signature.

Y' CONRAD A. RYAN. 

